Tubing machine



Sept. 5, 1933. v. ROYLE 1,925,545

TUBING MACHINE Filed May 10, 1928 2 sheets-sheet 1 (a INVENTOR w c BYQQMM Sept. 5, 1933. v. ROYLE TUBING MACHINE Filed May 10, 1928 2Sheets-Sheet 2 INVENTOR ATTORNEYS Patented Sept. 5, 1933 UNITED STATESPATENT OFFICE" 1,925,545 TUBING MACHINE Vernon Royle, Paterson, N. J. 7Application May 10, 1928. Serial No. 276,599

' 6 Claims. (01. 1s 1 This invention relates to an improvement in tubingmachines, and has for an object to pro vide an improved core structurewhereby the latter is adapted for the circulation in its body portion orstem of a temperature controlling medium in order to facilitate theoperation of the device.

Another object consists in providing such a structure which is sofashioned that both a temperature controlling medium and a non-adhesivemedium, such as-talc, may be passed through the core bridge and core,with the temperature controlling medium returning through the-said partsand the non-adhesive medium passing into the interior of the tube beingextruded by the machine.

A further object consists in providing such a structure which is soarranged that circulation of the mediums just named may be effected without hindering the passage of the material being extruded to any greaterextent than would be the case if there were no provision forcirculation. V

A'further object consists in providing certain improvements in the form,construction and arrangement of the several parts, whereby the abovenamed and other objects may be effectively attained.

Practical embodiments of the invention are represented in theaccompanying drawings, in

which I r l 1 0 Fig. 1 represents an elevation'of the preferred form;

Fig. 2 represents a central section, partly in elevation, taken in theplane of the line IIII of Fig. 1, looking in the direction of thearrows;

Fig. 3 represents a detail section taken in the plane of the lineIII-III of Fig. 1, looking in the direction of the arrows; r

Fig. 4 represents an enlarged detail section at right angles to Fig. 3;

Fig. 5 represents a longitudinal section, showing a modified form, andtaken in the plane of the line VV of Fig. 6, looking in the direction ofthe arrows;

Fig. 6 represents a section taken in the plane of the line VI-VI of Fig.5, looking in the direction of the arrows; r

Fig. 7 represents a detail section, atright angles passage 19 in theextension 15 that, in turn, is in to Fig. 5, and taken in the plane ofthe line VII VII of Fig. 5; Fig. 8 represents al'ongitudinal" section,partly in elevation, showing a second modified form,'and taken'in theplane of the line VIIIVIII"of Fig.

- 9; and

Fig. 9 represents an elevation, partly in-section, taken'in the plane ofthe line IX-IX of Fig. 8.

' able material.

' Referring to the preferred form shown in Figs. 1 to 4 inclusive, thehead, as a whole, is marked 1, and it is fitted 'to be secured to atubing machine casing in any well known or approved form as, forinstance, by stud bolts (not shown) passing through holes 2 and providedwith nuts. Suitable passages, indicated by 3, may be formed-in thehead 1for the circulation of a temperature controlling medium, according tothe customary practice.

The head 1 is adapted to carry a set of tubing elements or parts forforming the material, such as rubber compounds, into tubes and, as theshape and construction of the exterior or die elements constitute nopart of this invention, being disclosed in my co-pending applicationSerial No.

226,156, filed October 14, 1927, they will merely be referred to withoutdetailed description of their construction, arrangement, ;or function. r

The core bridge is marked 4, and it is held seated in a shoulder 5formed in the head 1 by a'member 6 that is threaded into the head, asindicated at 7. The said member 6 is formed so as to have a partrestricting the opening through which the material being extrudedpasses, as clearly shown in Figs. 2, 3 and 4. A part 8 is seated in themember 6 and locked therein by a ring nut 9. The said part 8 is centeredbyset screws 10, threaded in the member 6 in radial disposition, and itcarries a die ring 11 that is It will be observed that the core 13 ishollow and it is provided with a centrally disposed tube 17, which maybe composed of brass or other suit- The rear end of the said tube isthreaded into the extension 15 and the front end is secured to the frontend of the core 13 as, for

"instance,- by brazing.

Thetube 1'7 communicates by a port 18 with communication with radiallydisposed ducts 20, 21 formed in two arms of the core bridge, which ductsopen into are shaped chambers 22, 23in the core bridge 4 that areconnected with inlets 24, 25 inthe head 1' that communicate with inletpipes 26, 27 for'the non-adhesive material such as talc or soapstone.

will be seen that the temperature controlling mearrows on Fig. 4.

During the operation of the apparatus, the non-adhesive material is fedinwardly through the said pipes, and, by traversing the variouspassages, enters and proceeds through the tube 17 It is ejected from theforward end of the said tube into a chamber 28 in the extension 14, andthence passes outwardly through ports 29 formed in the said extension,so as to impinge upon the interior of the tube being formed and preventits inner walls from adhering when the tube 001- lapses after extrusion.

The temperature controlling medium for the core, which may be water, isfed in through pipe 30 that is tapped in the head 1 and is returnedthrough pipe 31 that is also tapped into the head 1 in a positiondiametrically opposite the pipe 30.

On flowing in through the pipe 30, the medium traverses a channel 32 inthe head 1, which channel opens into an are shaped chamber'33 formed inthe circumference of the core bridge 4. The said chamber 33 is incommunication with ducts 34 formed in an arm of the core bridge, whichducts extend into a passage 35 in the hub 16 of the core bridge. Thesaid passage 35 debouches into the hollow interior of the core 13, asclearly shown in Fig. 4.

A tube 36, which may be composed of brass or other suitable material hasone end set into the core bridge hub 16, as indicated at 37, so as tosupport it within the core 13 and in such position as to surround, withclearance, the tube 17 for the talc or the like, and be spaced from theinner walls of the core. The opening in the hub 16 which is traversed bythe tube 17 is larger than the said tube and is of substantially thesame diameter as the tube 36 so as to form a circular passage 38 leadingfrom the tube 36 to two sets of ducts 39, 40 formed in two radial armsof the core bridge.

The said ducts 39, 40 are in communication with an are shaped chamber 41fashioned in the periphery of the core bridge, which chamber, in turn,communicates with a passage 42 in the head -1 that leads to return pipe31.

As a result of the foregoing construction it dium, such as water, thatis fed in through pipe 30 will enter the hollow within the core 13surrounding pipe 36, will then enter the said pipe at its free forwardend, will then pass rearwardly through the said pipe 36 and passage 38,and will thence move outwardly through ducts 39, 40, chamber 41, passage42 and return pipe 31. The course of the said medium is indicated, inpart, by In this way, it will be seen that the temperature controllingmedium circulates throughout substantially the whole of the interior ofthe core 13 so as effectively to maintain the latter at the desiredtemperature for extruding the particular compound of material that is inhand; and that the circulation of the said medium does not in any wayaffect or obstruct the injection of the non-adhesive medium.

Referring tothe modified form shown in Figs. 5, 6 and 7, it may be saidthat the method of operation is the same and the general constructionsimilar. There is, however, a certain difference at the bridge core,which will now be described.

The tube corresponding to tube 36 in the preferred form is here marked43 and it is formed with an enlarged inner end 44 that is threadeddirectly onto the rear extension of the core which is, in this form,marked 45. The said enlarged inner end 44 is cut away, as indicated at46, to

preferred form with respect to the passages for the nonadhesivematerial, in that the modified formhas a pair of slanting passages 53,54 that connect the central passage 55 with the leads for the ducts 56,57 in the radial arms of the core bridge through which the non-adhesivematerial enters.

Referring to the second modified form shown in Figs. 8 and 9, it will'benoted that the passage in the core for the travel of the non-adhesivematerial consists of a simple bore 58 instead of a separate tube. Thisbore is restricted towards the forward end, and it will be understoodthat the core is provided with a forward extension of the sameconstruction as that represented by 14 in the preferred form.

This bore 58' is fed from a chamber 59 formed in the hub of the corebridge 60, which chamber is in communication with ducts 61, 62 in two ofthe radial arms of the core bridge, said'ducts being in communicationwith a source of non-adhesive material supply as in the other forms ofthe invention.

In this second modified form the core is marked 63 and it is reducedcentrally and surrounded by a pair of tubes 64, 65, which may becomposed of brass or the like. The forward ends of 7 the said tubes aresecured, as by brazing, to the core, and the rear ends are similarlyfixed to blocks 66, 67 that are fastened to the reduced portion of thecore. The said blocks are provided with openings 68, 69 that communicatewith are 5. shaped channels 70, 71 which open into passages 72, 73 inthe hub that are in communication with the water inlet and return ducts74, 75 formed in two radial arms of the core bridge. These ducts havesuitable connection with the temperature controlling medium, as in theother forms. 5

The tube 65 is perforate at its forward end as indicated at 76, 77 toprovide communication between the two circular chambers formed by thetubes 64, 65 surrounding the core 63. I

As a result of this construction, the water or, other temperaturecontrolling medium, can enter through the ducts 74 to the space orchamber between the tubes 64 and 65, then pass through the perforations76, 77 into the space or chamber between the tube 65 and core 63, andthen egress 1 5 through the opening 68 and ducts 75.

It is a characteristic of this second modified form shown in Figs. 8 and9 that the temperature controlling medium will be adjacent to the eX-lterior of the core because the thin tube 64 constitutes the outer wallof the core at the portion of circulation. Hence the medium will bestrongly effective in controlling the temperature of the core surface incontact with which the material being extruded is passed. In thisrespect the preferred form is next effective, and the modified formshown in Figs. 5, 6 and 7, least efiective. Varying conditions ofoperation may lead to the selection of any one of these forms for thisreason and. also for constructional reasons. 7

The operation of the device has been explained in connection with themechanical description so that the same need not be repeated, but it maybe said that the mode of operation is substantially the same inconnection with all the forms, and that the apparatus provides means foraccurately controlling the temperature of the core body or stem withwhich the material being extruded passes in close contact. This is amatter of substantial importance because proper temperature controlgreatly facilitates the operation and increases the output as well asimproving the product. Such control is not sufliciently acquired byacting upon the exterior members only, and my invention lendsitself to amore perfect result in this respect than has heretofore been attainable,particularly by reason of the fact that the core proper or stem whichsupports the core die member has its temperature regulated to thedesired point.

It will be understood that various changes may be resorted to in theform, construction and arrangement of the several parts withoutdeparting from the spirit and scope of my invention; and hence, I do notintend to be limited to the details herein shown and described, exceptas they may be included in the claims.

What I claim is:

1. In a tubing machine, a longitudinally disposed cylindrical core body,and means for injecting and ejecting a non-adhesive medium therethroughand for circulating a temperature controlling medium therein.

2. In a tubing machine, a core bridge, a longitudinally disposedcylindrical core body supported thereby and extending forwardlytherefrom, and passages in the bridge and body for the injection andejection of a non-adhesive medium and the circulation of a temperaturecontrolling medium.

3. In a tubing machine, a core bridge, a rearward extension therefrom, acore body supported by and extending forwardly from the bridge, passagesin the bridge and extension for leading a non-adhesive medium to thetube being extruded, and passages in the bridge and body for circulatinga temperature controlling medium through said parts.

4. In a tubing machine, a hollow core body, a plurality of tubes withinsaid body, one tube being within the other, the outer tube being spacedfrom the walls of the body and the inner tube being spaced from theouter tube, means for circulating a temperature controlling mediumthrough said body exterior to said outer tube and also between the twotubes, and means for injecting a non-adhesive medium through the innertube.

5. In a tubing machine, a core bridge, a hub projecting forwardlytherefrom, a hollow core body threaded to said hub, a tube fitted tosaid hub and located within the body, said tube being spaced from theside and forward end walls of the core body, and means for circulating atemperature controlling medium through said body both without and withinsaid tube.

6. A tubing machine head having a bore through which the material to beextruded may be forced, a die supporting spider mounted inwardly of saidhead, a mandrel attached to said spider for carrying a plug die at theextrusion orifice of said head, a plug die mounted on the end of saidmandrel, and a cap nut for holding and adjusting said die on saidmandrel, said spider, mandrel, and cap nut having ducts there- VERNONROYLE.

